Protect your boat from damage while docking at night with the Sierra Heavy-Duty Docking Light. The 30,000 cp bulb illuminates below the deck line, making nighttime docking safe and easy. The newly designed light housing is fully sealed without the use of the old style o-ring. This docking light allows you to align and change the "eyeball" from the exterior of the hull. Just loosen the set screw to align or change. This eliminates the need for access to the rear of the installed docking light. Mil-Spec sealed waterproof, dustproof rocker switch panel included. Intended for docking only. Not for continuous use.